Răspuns:
Explicație pas cu pas:
(11 3/20 - 12 5/16) + (3 1/6 - 4 13/20) introduci intregii in fractie
(223/20 - 197/16) + (19/6 - 93/20)
223/20 - 197/16 + 19/6 - 93/20
223/20 - 93/20 -197/16 + 19/6
133/20 - 197/16 + 19/6
20 = 2^2*5
16 = 2^4
6 = 2*3
cmmmc = 2^4*3*5 = 240
133/20 - 197/16 + 19/6 = 1596/240 - 2955/240 + 760/240 = -599/240
